BESM stands for "Bolshaja Elektronno-Schetnaja Mashina" in Russian, which can be translated as "Large Electronic-Computing Machine" or simply "Large Computer".
BESM-6 was designed in S.A.Lebedev Institute of Precise Mechanics and Computing Equipment (ITMiVT in Russian) in the 1965. This is a mainframe type computer.
... (MGB, 1946-1954)
Komitet Gosudarstvennoi Bezopasnosti (KGB; 1954-1991)
South Africa
National Intelligence Agency[?]
((South African Secret Service))
Spain
Centro ...